Ice-making apparatus.



P. E. MCGRARY. ICE MAKING APPARATUS. `APPVLIGATIOIT FILED OCT. 3, 190i.

Patented Feb. 7, 191 1.

Unrriin STATES PATENT onirica.

Y Pinnen n. Mccniinr, or PHILAnnLPHIA, rnnnsjilvnniaffl!" ff infin'. may concern: known that I, .Pinnen R. McCRAm', ii. of the United States, and resident citi of ilfliiladelphia, in the county of PhiladeL L,phiaand State4 of. Pennsylvania, have 11iventet certain nein and useful Improvey' .inentsfiii,lcel\laking Apparatus, of which thefolloliving is a specification.

"Ihisdnvention'relates to ice making ap faiftatiis, and has'v in vieiv 'the Vproduction -of ice instationary containers, abolishing the necessity of removing and replacing such 'fcntainers.

t further has 4 in View the production of transparent ice 'Wit-hout distillation of the -iva'ter fused and t Without eniplo Tnient of stirrers in the ice containers, all as will more fully appear freni. the detaileddescription,

'the claims and thedrawing in which Figure 1 is a' Aplan of the apparatus ein# bodying my invention. F ig. Q a section on line 2-Q of Fig. 1. Fig. 3 is a.detail View` ofa container.

In the iiguies 1 represents a tank preferablv supplied With an insulating packing. The lower portion of the tank 2 constitutes an air tight cooling compartment surrounding the ice -cans or containers 3, 3, which containers communicate below through the pipes 4C, 4 and above through openings in the sides, 5, 5.

Gis an inlet pipe for water outlet-'pipe fc5' water..

8 is an inlet pipe for air and 9 .is an outlet/pipe for air. i

- l0, 10 are spray pipes to spray solution of calcium chlorid against the sides of the containers and 11 is an outlet pipe for the and 7 is an j caicinm chlorid solution.

12 is a drip pipe for moisture condensed from air used' to thanT the ice forniedin the 4containers 3, so as to become loose and iise i to the top ofthe Water covering it.

13 are diaphragms of rubber or other classl tic material to allow anexpansion of the water in the pipes after the ice in the containers has frozen solid, when no upward expansion is' admitted.

14:v represents insulating material such as cork, placed 4betvv'een the upper portions of 'the containers, and 15 represents like ma teriahsnrrounding the outlet pipes et at the,

bottom of the containers. The. outlet pipes are still further protected against freezing by the air channel 16, (Figh- 3) between the Apipes and thelinsulatingmaterial icnavianine jArrana'riis.

Specification of Letters Patent. Patented Feb. "I, 1911. Application filed October 3, 1904. Serial No.- 227,052.5.

17 (Figj) are rods from which the containers 3, 3 are suspended. v4.18. are partitions separating one conipart nient from another.

19 is a cover for an ice container.

.The operation of the apparatus is as follows. Tater is introduced through the pipe 6 until it overflows through the pipe 7.

vCold air is then passed in through the pipe Sand out through theA pipe 9 Water. circulating through the containers ofthe tank until the ice isfro'zen vsolid in -some of ythel containers when the circulation is stopped and the freezingr is completed while the water in ythe containers is quiescent. -Cold calcium chlorid solution is sprayed the saine time the current of cold air is passed through the compartment 2. By the combined act-ion of the spray of cold calcium chlorid solution and cold air the period of freezing'is very much shortened. After the lfreezing, air above the freezing point 'is passed through the compartment 2, thronghthe inlet pipe 8 and the outlet pipe 9;' This ,air

`current is continued until the blocks of ice have thawed enough to' become loosened "and float on the top of the Water in the containers. The insulating material lll-serves to prevent ice forming at the upper portion of the containers 3v, and the insulating material 15 and the air channel 16 serve to prevent the ivater in the pipes Il from freezing.

After the freezing on thefour sides of a container has proceeded so far that tliepfaces of ice meet and unite, a' current of Water can no longer be passed through the containers 3. Thisv closing of the ice block may'serve as an automatic means for cutting oifj the current of'water passing through the ."containers 3,' or this current may be stopped arbitrarily when the. freezing has preceedd to a certain point, for instance when ice.v

blocks have reached a size about four fifths of the size of the--liiiished blocks. faces of ice on the four sides have united. the

further' formation of ice on the lower part" After the of theblock will cause azi-expansion, and

this espansion would burst the pipes 47 nless provision was made to furnish increased room for the contained water. This is 'done by the elastic diaphragme 13.

Inasniuch as the containers in which the ice is frozen 'are stationary,- the time and. labor required'- to removeand replace. the `same is' saved; By the circulation of the "Water, transparent llice is formed Without distilling the Water and Withou-tlir-,aintaining stirrers in operation in the iiidivdual ice containers or cans, which involves much labor and inconvenience. y

What I claim as new is:

1^. In refrigerating apparatus the combination of an incloslng casing, Water containers located in the casing and communiv'eating-With each other and mafs for caus- 111g Water to flow continuously in one diree-` ftion from one container to another through-- out the series While icev is bein-glormed. 2.' The Vcombination of an inclosing casing, Waterv containers located in the casing', said lcontainers being alternately connected at the tops and bottoms.

3. The combinati-on of a plurality of Water -containers communicating with each other,

an air tight compartment surrounding the ower insulating the upper portion of the containers and means for bringing a cooling medium into contact with the lower portion of the container.

4l The combination of a plurality of Water containers communicating With each other, means for causing water to flow continu- A ing the pipes.

ortion of the containers, means for i G. The combination of an inclosing casing, Water containers located in the casing, a pipe connecting the bottom of .one container with the bottom of another container and a diaphragm in said pipe adapted to yield to the pressure of the Water caused by ice fori mation in the Water containers,

Signed at Philadelphia in the county of Philadelphia and State of Pennsylvania this 13th day of September A. D. 1904.

PIERCE R. MCGRAR fitnesses: l

C. A. O. RosELL, i DAVID A. HAMMOND.

compart- 

